Rotary clipper



ROTARY CLIPPER Filled sept. l1. 1942 l Mie-star Secrs 3/ 4 v Snvenfot(Ittornegw l Patented Mar. 2', 1943 UNITED STATES f PATENT oFFlcE no'rmreinem inestaseiders, madman. Application September 1, 1942, Serial No.456,872

' e claim. (ci. sms) My invention relates to rotary clipper devices, andmore particularly to those adapted for and specially intended to cupthehairsgrowing in 4 the nose and ear cavities of a person, and myobject is to provide a fully protected safety device for closelyclipping the hairs. in such like Acavities in a simple andeiTective-manner, free from any discomfort or likelihood of harm to vthedelicate surrounding membrane.

More specifically my invention relates to an improved rotary clipperdevice having a safety cutting head, with a cutter blade movably mountedthereon, and means for operating said blade in a successive cycle ofspirally projected rotations.

The nature of my improvements and the mann'er of their operation will bemore fully described hereinafter in connection with the accompanyingdrawing, and the novel features set forth in the appended claims.

Fig. 1 is a side elevationoi' a -rotary clipper I embodying myinvention. 4

Fig. 2 is a longitudinal sectional view, on an iiilarlged scale, of theclipper device shown in Fig. 3 is an enlarged cross sectional View ofthe safety cutting head, taken on the line 3-3 of Fig. 2.- v y Fig. 4 isa separate perspective view of the i rotary cutter blade or thimbleshear knife.

inder, closed at one end by apertured plug 6, and.

its larger open opposite end being shown as internally screw-threaded toreceive the screw threaded inner end of the safety cutting head 8.

Cutting head 8 may, for economy of material' and convenience'inmachining, be made up of several parts welded together, but is shownl inthe drawing as an integral cyllnderwith the wall at its free endthickened and radially slotted to form a circle of comb-like teeth orprongs 8 extending rearwardly to an interior cross-partition I0intermediately dividing the inner length of said head 8, and to anexterior guard ring II,

limiting .the distance said prongs .9 may be inserted into a nose orearcavity.

The outer end of head 8 is interiorly circularly slotted as shown at I5,beginning at the partition I0 and extending close to the outer endsl ofprongs 9; the outer diameter of said slot conforming with the'innerdiameter of the head 8,. rearward ofesaid partition, and forming aguideway extension of such inner diameter for a rotary shear knifethimble or cutter blade I6 as shown. This circularslot `l5 isinterrupted by the spacings between said prongs 9, and forms haircutting edges Il, Il on the side walls of said prongs for cooperationwith said cutter blade I6 as hereinafter described.

The cutter blade I6 is shown in the form of a thimble shear `knifefitted within fthe cylinder head 8 and rotatablyand longitudinallymovable in guide way I 5, as controlled by a cylinder cam 25, towhichitis secured by a screw bolt i8 engaging through an interposed washer I9and an aperture 20 in the base wall 2l of said thimble.

A dowel pin 22 insures rotation of cutter bladel I8 with cylinder cam25, and cutting teeth 23 are formed on the annular edge of saidcutterblade I6. Cross partition I8 is shown asl apertured at 24 forinsertion of a screw driver vto tighten and loosen screw bolt I8.

Cylinder cam 25 is mounted to rotate and move longitudinally ,in housingcylinder 5, and is formed with a cam groove 26 engaged by a' stud pin 21set into the wall of said housing cylinder 5. Cylinder 25 is shown asreceiving the end of a rotatable cam spindle 30, also formed with a ycam groove 3I engaged by `a stud pin 32 set into the wall of camcylinder 25. The outer end of cam spindle 30 extends through aperturedplug 6, and has secured to it a turn knob 32, as shown.

In order that cam spindle 30 may be turned 'I only in one direction, thedrawing shows said spindle with an enlarged collar portion 35 rotatablymounted in housing cylinder 5, and having a cam recess 38 in which apawl -roller v3I seats against a compression spring 38. When spindle 30is rotated in one direction, pawl roller 3l seats at the base of its camrecess 36, but an attempt to reversely turn spindle 30 causes the pawlroller 31, under tension ofits spring 38, to rideup the cam face of itsrecess 38 so as to frictionally engage against the inner wall of housingcylinde r 5 and prevent rotation of spindle 30.

An imporant feature of my improvements, insuring positive and cleancutting of the hairs without danger oi pulling them out by their roots,

1S that the cutting blade` I8 shall both projectv and Yretractlongitudinally and rotate across the cutting edges I1, I1 of the prongs0, preferably in, a spiral projecting and straight retracting f cycleof' movement. To this end cam groove 28 and its stud 2l, and cam groove3| and its stud 32 cooperate as they are rotated by turn knob I2,spindle '30 merely rotating, but cylinder 25,

to which the cutter'blare I6 is secured, both rotating and movinglongitudinally back and forth in housing cylinder 5, so as to spirallyproject and retract cutter blade I8. This cooperative action of the camgrooves 26 and 3| insures positive spiral projection and retraction ofcutting,

variety employed necessitating a cross-track guide way l5, is fullyprotected and safe from any danger of pinching or cutting the delicatemembrane lining such cavities. The prongs Y9 are preferably rounded attheir closed outer ends .as shown and smoothly finished` to facilitateentrance into a cavity without harm.

From the foregoing description, it will be clearly seen that `my clipperdevice is fool proof and safely cuts the hairs without pull or danger ofharming the cavity membrane, which is sensitive and -subject todangerous inflammations and disorders when injured.

The specic detail shown and described may of course bemodied within thescope of my invention as deflnedin the following claims:

What I claimis:

l. A rotary clipper device comprising a cylindrical cutting head havinga circular series of spacedapart prongs each partially longitudinallyslotted to jointly form a circular guide way for a cooperatingcylindrical cutter blade mounted to rotate and move longitudinally in'said head, said prong slots forming longitudinal cutting edges, and saidcutter blade having cooperating en d cutting teeth, and means forspirally projecting said 2. A rotary clipper device comprising 'acylindrical cutting head having a circular series of V cutting teethacross said prong slot cutting edges.

va body orice.

4 amants forming a circular guide way within said prongs 'openingrearwardly into thel interior ofxsaid cylindrical cutting head, acooperating cylindrical -cutter blade mounted in said head and rotatablyand longitudinally movable in said guide way,

said prong slots forming longitudinal side wall cutting edges, saidcutter bladehaving end cutting teeth cooperating with said cuttingedges,

and means for spirally projecting and retracting said cutting blade insaid guide way to move its cutting teeth across said prong slot cuttingedges.

3. A rotary hair clipper device comprising a cutter head having acircular series of spaced prongs each partially longitudinally slottedto formspaced side wall cutting edges in the respective prongs and tocooperatively form a cylindrical guide way extending into andintermediately crossing said spaced prongs, and a cylindrical cutterblade mounted to rotate in said guide way and having end teeth progres-vsively passing through each prong so as to sever intermediate sectionsof hairs extending radially between said prongs. a

4. A rotary hair clipper device comprising a cutter head having acircular series of spaced sections of hairs extending radially b'etweensaid prongs, and a cam spindle mechanism having a turn knob foroperating said cutter -blade in a succession of spirally projected andretracted rotary cycles.

5. In the construction set forth in claim 4, said cam spindle mechanismcomprising a rotary cam spindle and a cooperating rotating andlongitudinally movable cam cylinder secured to said, cutter blade, andsaid cam spindle having a ratchet mechanism to prevent'vreverserotation.

thereof.

6. In the 'construction set forth ing'claim 3, l said cutter head havingan exterior encircling guard ring defining its depth of projection intoHIESTER SEIDRS.

